Method for manufacturing composite fiber of hemp

ABSTRACT

A method for manufacturing composite fiber of hemp includes steps of: preparing hemp material: cutting stem of hemp into pieces, drying and charring the pieces of hemp at 800 to 1200 degrees Celsius and grinding the pieces of hemp into powder to form a hemp material; preparing primary granule: mixing the hemp material and nylon granules in a weight ratio of 5-20:95-80, melting and granulating the hemp material and nylon granules to form primary granules; preparing mixed granules: mixing and melting the primary granules and nylon granules in a weight ratio of 5-20:95-80 and granulating to form mixed granules; spinning: melting the mixed granules to spin into a composite fiber.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a method for manufacturing composite fiber.

Description of the Prior Art

Polyester fiber is widely used because of the good strength, flexibility, quick-drying, and difficulty of wrinkling. Thus, polyester fiber is often spun with other plastic fiber to form functional cloth.

However, polyester fiber is disadvantageous in bad function of moisture adsorption and warming. In addition, it generates static often, and it's unable to bear high temperature. Besides, polyester fiber is completely man-made and not environment-friendly.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide a method for manufacturing composite fiber of hemp in order to provide composite fiber which is environment-friendly, anti-oxidation, warm, and antistatic.

To achieve the above and other objects, the method for manufacturing composite fiber of hemp of the present invention includes the following steps.

Prepare hemp material: Cut stem of hemp into pieces, dry and char the pieces of hemp at 800 to 1200 degrees Celsius and grind the pieces of hemp into powder to form a hemp material.

Prepare primary granule: Mix the hemp material and main granules in a weight ratio of 5-20:95-80 wherein the main granules are selected from a group composed of nylon granules or polyester granules, melt and granulate the hemp material and main granules to form primary granules.

Prepare mixed granules: Mix and melt the primary granules and main granules in a weight ratio of 5-20:95-80 and granulate to form mixed granules.

Spinning: Melt the mixed granules to spin into a composite fiber.

To achieve the above and other objects, another method for manufacturing composite fiber of hemp of the present invention includes the following steps.

Prepare hemp material: Cut stem of hemp into pieces, dry and char the pieces of hemp at 800 to 1200 degrees Celsius and grind the pieces of hemp into powder to form a hemp material.

Prepare primary granule: Mix the hemp material and main granules in a weight ratio of 5-20:95-80 wherein the main granules are selected from a group composed of nylon granules or polyester granules, melt and granulate the hemp material and main granules to form primary granules.

Mixing, melting, and spinning: Mix and melt the primary granules and main granules in a weight ratio of 5-20:95-80 followed by spinning into a composite fiber.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 and 2 are flow charts of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIG. 1, the method for manufacturing composite fiber of hemp of the present invention includes the following steps.

Prepare hemp material: Cut stem of hemp 10 a into pieces. Dry and char the pieces of hemp 10 b at 800 to 1200 degrees Celsius and grind the pieces of hemp 10 b into powder 10 c to form a hemp material 10. Preferably, the hemp material 10 is powder composed of nanoparticles.

Prepare primary granule: Mix the hemp material 10 and main granules 20 in a weight ratio of 5-20:95-80 (preferably 15:85) wherein the main granules 20 are selected from a group composed of nylon granules or polyester granules. Melt and granulate the hemp material 10 and main granules 20 to form primary granules 30.

Prepare mixed granules: Mix and melt the primary granules 30 and main granules 40 in a weight ratio of 5-20:95-80 (preferably 15:85) and granulate to form mixed granules 50. Preferably, the mix granules 50 includes 0.2-2 wt % of the hemp material 10.

Spinning: Melt the mixed granules 50 to spin into a composite fiber 60.

Please refer to FIG. 2, in another embodiment of the present invention, the method for manufacturing composite fiber of hemp includes the following steps.

Prepare hemp material: Cut stem of hemp 10 a into pieces. Dry and char the pieces of hemp 10 b at 800 to 1200 degrees Celsius and grind the pieces of hemp 10 b into powder 10 c to form a hemp material 10. Preferably, the hemp material 10 is powder composed of nanoparticles.

Prepare primary granule: Mix the hemp material 10 and main granules 20 in a weight ratio of 5-20:95-80 (preferably 15:85) wherein the main granules 20 are selected from a group composed of nylon granules or polyester granules. Melt and granulate the hemp material 10 and main granules 20 to form primary granules 30.

Mixing, melting, and spinning: Mix and melt the primary granules 30 and main granules 40 in a weight ratio of 5-20:95-80 (preferably 15:85) followed by spinning into a composite fiber 60. Preferably, the mixture of the primary granules 30 and main granules 40 includes 0.2-2 wt % of the hemp material 10.

That is, the primary granules and the main granules can be mixed to form the mixed granules for storing, and the mixed granules are melted and spun into the composite fiber if needed. However, the primary granules and the main granules can be melted and spun into the composite fiber directly too.

In conclusion, the present invention transfers waste hemp stem into composite fiber whose quality is better than nylon fiber. In addition, the composite fiber of the present invention is deodorant, antimicrobial, moisture adsorbing, anti-oxidation, and warm. Besides, it's also advantageous in physical strength and flexibility. 

What is claimed is:
 1. A method for manufacturing composite fiber of hemp, including steps of: preparing hemp material: cutting stem of hemp into pieces, drying and charring the pieces of hemp at 800 to 1200 degrees Celsius and grinding the pieces of hemp into powder to form a hemp material; preparing primary granule: mixing the hemp material and main granules in a weight ratio of 5-20:95-80 wherein the main granules are selected from a group composed of nylon granules or polyester granules, melting and granulating the hemp material and main granules to form primary granules; preparing mixed granules: mixing and melting the primary granules and main granules in a weight ratio of 5-20:95-80 and granulating to form mixed granules; spinning: melting the mixed granules to spin into a composite fiber.
 2. The method for manufacturing composite fiber of hemp of claim 1, wherein the hemp material and main granules are mixed in a weight ratio of 15:85, the primary granules and main granules are mixed in a weight ratio of 15:85.
 3. The method for manufacturing composite fiber of hemp of claim 1, wherein the hemp material is powder composed of nanoparticles.
 4. The method for manufacturing composite fiber of hemp of claim 1, wherein the mix granules includes 0.2-2 wt % of the hemp material.
 5. A method for manufacturing composite fiber of hemp, including steps of: preparing hemp material: cutting stem of hemp into pieces, drying and charring the pieces of hemp at 800 to 1200 degrees Celsius and grinding the pieces of hemp into powder to form a hemp material; preparing primary granule: mixing the hemp material and main granules in a weight ratio of 5-20:95-80 wherein the main granules are selected from a group composed of nylon granules or polyester granules, melting and granulating the hemp material and main granules to form primary granules; mixing, melting, and spinning: mixing and melting the primary granules and main granules in a weight ratio of 5-20:95-80 followed by spinning into a composite fiber.
 6. The method for manufacturing composite fiber of hemp of claim 5, wherein the hemp material and main granules are mixed in a weight ratio of 15:85, the primary granules and main granules are mixed in a weight ratio of 15:85.
 7. The method for manufacturing composite fiber of hemp of claim 5, wherein the hemp material is powder composed of nanoparticles.
 8. The method for manufacturing composite fiber of hemp of claim 5, wherein the mixture of the primary granules and main granules includes 0.2-2 wt % of the hemp material. 